Lexus ES manuals

Lexus ES: Pressure Control Solenoid "H" Circuit Short to Ground or Open (P281614)

Lexus ES (XZ10) Service Manual / Drivetrain / Ub80f (automatic Transmission / Transaxle) / Automatic Transaxle System / Pressure Control Solenoid "H" Circuit Short to Ground or Open (P281614)

DESCRIPTION

Refer to DTC P281612.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P281614

Pressure Control Solenoid "H" Circuit Short to Ground or Open

While the vehicle is being driven so that gear changes occur, a short to ground or open is detected in the solenoid (SL5) valve circuit for 1 second (1-trip detection logic).
  • Solenoid (SL5) valve
  • Transmission wire
  • Harness and connector
  • ECM

Comes on

DTC stored

SAE Code:

P281D

MONITOR DESCRIPTION

This DTC indicates an open or short to ground in the solenoid (SL5) valve circuit. The ECM commands gear shifts by turning the solenoid valves on or off. When there is an open or short in any solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores a DTC.

The ECM performs the fail-safe function and turns the other normal solenoid valves on or off. In the case of an open or short circuit, the ECM stops sending current to the open or shorted solenoid.

MONITOR STRATEGY

Related DTCs

P281D: Solenoid (SL5) valve/Range check (Low current)

Required sensors/components

Solenoid (SL5) valve

Frequency of operation

Continuous

Duration

1 sec.

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

None

Solenoid current cut status

Not cut

Engine switch

On (IG)

Starter

OFF

Battery voltage

10.5 V or more

Target current (0.1 sec. or more)

0.2 A or more

TYPICAL MALFUNCTION THRESHOLDS

Solenoid current

Less than 0.075 A

COMPONENT OPERATING RANGE

Solenoid current

0.075 A or more

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

  • After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the engine switch off and wait for 2 minutes or more.
  5. Turn the engine switch on (IG) and turn the Techstream on.
  6. Start the engine.
  7. Perform the D Position Shift Test inspection in Road Test. [*1]

    Click here

    HINT:

    [*1] : Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  8. Stop the vehicle.
  9. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  10. Input the DTC: P281614.
  11. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to DTC P281612.

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CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs.

    Click here

  • Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

    Click here

PROCEDURE

1.

CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE (SOLENOID (SL5) VALVE) - ECM)

(a) Disconnect the C78 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C78-14 (SL5+) - C78-13 (SL5-)

20°C (68°F)

5.0 to 5.6 Ω

C78-14 (SL5+) or C78-13 (SL5-) - Body ground and other terminals

Always

10 kΩ or higher
NG

GO TO STEP 3

OK

2.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM REGISTRATION

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the C30 transmission wire connector.

(b) Disconnect the C78 ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C30-26 (SL5+) - C78-14 (SL5+)

Always

Below 1 Ω

C30-25 (SL5-) - C78-13 (SL5-)

Always

Below 1 Ω

C30-26 (SL5+) or C78-14 (SL5+) - Body ground and other terminals

Always

10 kΩ or higher

C30-25 (SL5-) or C78-13 (SL5-) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)
OK

4.

INSPECT SOLENOID (SL5) VALVE

(a) Remove the solenoid (SL5) valve.

Click here

*a

Component without harness connected

(Solenoid (SL5) Valve)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Solenoid (SL5) valve connector terminal 1 - terminal 2

20°C (68°F)

5.0 to 5.6 Ω

(c) Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

OK

REPAIR OR REPLACE TRANSMISSION WIRE

NG

REPLACE SOLENOID (SL5) VALVE

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